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Specify exception constructors

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* For nonexistent_local_time and ambiguous_local_time.
* Simplify the constructors.
* Make these exceptions usable for custom time zones.
This commit is contained in:
Howard Hinnant
2017-10-24 12:13:13 -04:00
parent b3a55312ce
commit 20fb6af497
2 changed files with 10810 additions and 3 deletions
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@@ -26,7 +26,7 @@
<br/> <br/>
<br/> <br/>
<a href="mailto:howard.hinnant@gmail.com">Howard E. Hinnant</a><br/> <a href="mailto:howard.hinnant@gmail.com">Howard E. Hinnant</a><br/>
2017-10-16<br/> 2017-10-24<br/>
</address> </address>
<hr/> <hr/>
<h1 align=center>Time Zone Database Parser</h1> <h1 align=center>Time Zone Database Parser</h1>
@@ -1506,9 +1506,37 @@ class nonexistent_local_time
: public std::runtime_error : public std::runtime_error
{ {
public: public:
// Construction is undocumented template &lt;class Duration&gt;
nonexistent_local_time(local_time&lt;Duration&gt; tp, const local_info&amp; i);
}; };
</pre> </pre>
<pre>
template &lt;class Duration&gt;
nonexistent_local_time::nonexistent_local_time(local_time&lt;Duration&gt; tp,
const local_info&amp; i);
</pre>
<blockquote>
<p>
<i>Requires:</i> <code>i.result == local_info::nonexistent</code>.
</p>
<p>
<i>Effects:</i> Constructs a <code>nonexistent_local_time</code> by initializing
the base class with a sequence of <code>char</code> equivalent to that produced
by <code>os.str()</code> initialized as shown below:
</p>
<pre>
std::ostringstream os;
os &lt;&lt; tp &lt;&lt; " is in a gap between\n"
&lt;&lt; local_seconds{i.first.end.time_since_epoch()} + i.first.offset &lt;&lt; ' '
&lt;&lt; i.first.abbrev &lt;&lt; " and\n"
&lt;&lt; local_seconds{i.second.begin.time_since_epoch()} + i.second.offset &lt;&lt; ' '
&lt;&lt; i.second.abbrev
&lt;&lt; " which are both equivalent to\n"
&lt;&lt; i.first.end &lt;&lt; " UTC";
</pre>
</blockquote>
<p> <p>
[<i>Example:</i> [<i>Example:</i>
</p> </p>
@@ -1560,9 +1588,35 @@ class ambiguous_local_time
: public std::runtime_error : public std::runtime_error
{ {
public: public:
// Construction is undocumented template &lt;class Duration&gt;
ambiguous_local_time(local_time&lt;Duration&gt; tp, const local_info&amp; i);
}; };
</pre> </pre>
<pre>
template &lt;class Duration&gt;
ambiguous_local_time::ambiguous_local_time(local_time&lt;Duration&gt; tp,
const local_info&amp; i);
</pre>
<blockquote>
<p>
<i>Requires:</i> <code>i.result == local_info::ambiguous</code>.
</p>
<p>
<i>Effects:</i> Constructs an <code>ambiguous_local_time</code> by initializing
the base class with a sequence of <code>char</code> equivalent to that produced
by <code>os.str()</code> initialized as shown below:
</p>
<pre>
std::ostringstream os;
os &lt;&lt; tp &lt;&lt; " is ambiguous. It could be\n"
&lt;&lt; tp &lt;&lt; ' ' &lt;&lt; i.first.abbrev &lt;&lt; " == "
&lt;&lt; tp - i.first.offset &lt;&lt; " UTC or\n"
&lt;&lt; tp &lt;&lt; ' ' &lt;&lt; i.second.abbrev &lt;&lt; " == "
&lt;&lt; tp - i.second.offset &lt;&lt; " UTC";
</pre>
</blockquote>
<p> <p>
[<i>Example:</i> [<i>Example:</i>
</p> </p>